initial commit of new GridSeq firmware

firmware/GridSeq/app_state.h

@@ -0,0 +1,38 @@
+/**
+ * @file app_state.h
+ * @author Adam Wonak (https://github.com/awonak/)
+ * @brief Alt firmware version of Gravity by Sitka Instruments.
+ * @version 2.0.1
+ * @date 2025-07-04
+ *
+ * @copyright MIT - (c) 2025 - Adam Wonak - adam.wonak@gmail.com
+ *
+ */
+
+#ifndef APP_STATE_H
+#define APP_STATE_H
+
+#include <libGravity.h>
+
+#include "channel.h"
+
+// Global state for settings and app behavior.
+struct AppState {
+    int tempo = Clock::DEFAULT_TEMPO;
+    Clock::Source selected_source = Clock::SOURCE_INTERNAL;
+    Channel channel[Gravity::OUTPUT_COUNT];
+    byte selected_param = 0;
+    byte selected_channel = 0;    // 0=tempo, 1-6=output channel
+    byte cv_run = 0;
+    byte cv_reset = 0;
+    bool editing_param = false;
+    bool refresh_screen = true;
+};
+
+extern AppState app;
+
+static Channel& GetSelectedChannel() {
+    return app.channel[app.selected_channel - 1];
+}
+
+#endif  // APP_STATE_H